<template>
  <div class="xtx-infinite-loading" ref="target">
    <div class="loading" v-if="loadingState">
      <span class="img"></span>
      <span class="text">正在加载...</span>
    </div>
    <div class="none" v-if="endState">
      <span class="img"></span>
      <span class="text">亲，没有更多了</span>
    </div>
  </div>
</template>

<script>
import { useIntersectionObserver } from "@vueuse/core";
import { ref } from "vue";

export default {
  name: "XtxInfiniteLoading",
  props: ["loadingState", "endState"],
  setup(props, { emit }) {
    let target = ref(null);
    // 监听加载组件是否进入了可视区
    useIntersectionObserver(target, ([{ isIntersecting }]) => {
      // console.log(isIntersecting);
      if (isIntersecting) {
        // console.log("加载组件进入可视区");
        emit("judgeLoadingOrEnd");
      }
    });

    return {
      target,
    };
  },
};
</script>

<style scoped lang="less">
.xtx-infinite-loading {
  .loading {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 200px;

    .img {
      width: 50px;
      height: 50px;
      background: url(../../assets/images/load.gif) no-repeat center / contain;
    }

    .text {
      color: #999;
      font-size: 16px;
    }
  }

  .none {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 200px;

    .img {
      width: 200px;
      height: 134px;
      background: url(../../assets/images/none.png) no-repeat center / contain;
    }

    .text {
      color: #999;
      font-size: 16px;
    }
  }
}
</style>
